Forming apparatus



Sept. 20, 1927. 1 6fl2,755

H. L. WARD FORMING APPARATUS Filed Sept. 10, 1925 [nus/liar fife/22y Z. Ward QVMW.

; AZZZZ Patented Sept. 20, 1927.-

HENRY L. wann,

PANY, INCORPORATED, OF NEW YORK,

OI CHICAGO, ILLINOIS, ASSIGNOR TO WESTERN ELECTRIC COM- N. Y., A CORPORATION OF NEW YORK.

ronmmc APPARATUS.

Application filed September 10, 1923. Serial No. 661,789.

Thisinvention relates to forming apparatus, and more particularly to molds employed in forming articles of synthetic resmous aterial.

5 1n molding phenolic condensation products or other. plastic materials into articles, it is sometimes desirable to produce a smoot glossy surface, and it is well known that such a surface can be obtained by placing in no contact with the material, during the molding operation, a olished member of non p sheets of material assembled for l i i v as copper.

ferrous metal, sue

the manufacture of mold:

Furthermore, in ed articles it is frequentlg employ a multiple mold. n such unstances it is important that the cooperat ng parts may be readil. assembled in their correct relation, and i the material employed is in partially formed state it is essential that 1t ma be quickly and properly placed 1n the mo ding spaces.

. It is an object of the inventlon to improve apparatus for forming synthetic reslnous material into articles.

Another object of the invention 1s to maintain the smoothness of acopper surface contacting with moldable material by remforcin the contacting copper surface throu iout'its extent. Y

A rther object is to prevent adherence of synthetic resinous material to a forming member durin the formation of the material into an artlcle by coating the mold with PP A still further object is to insure the'proper positioning of the members of a mo (1 and the material therein by providing means associated with one member and engaging an opening extending through another member. J

A formin lurality of steel members, the

comprise a aces thereof being plated with the practice to that' obstructions ma a paratus made in accordance with one 'em 0 lment of this lnventlon may one member enow a side elevation and accordance with one embodiment of the invention;

Fig. 3 shows an enlarged sectional view taken along the line 33 of Fig. 2 and showing the molded article in the mold;

Flg. 4 1s a fragmentary sectional view h taken at the line 4-4 of Fig. 2;

Fig. 5 shows a portion of Fig. 3 enlarged to clearly indlcate the plating on the mold members;

Fig. 6 is an elevation of a plurality of the mold, and

Flg. 7 is a plan of theforined article as removed from the mold.

Referring to the drawings, mold members 10, 11 and 12, composed preferably of steel plated with copper, are arranged to be assembled to form a molding unit, depressions 1n the outer members and 12 cooperating with depressions formed in the two surfaces 0f the intermediate member 11 to simultancously form .two articles. K

A double gointed pin 15 secured in the center of an projecting from the top and bottom surfaces of the intermediate member 11 is adapted to project through the serves to properly position the material in the mold; A plurality of double pointed pins 18 also mounted in, and near the periphery of the intermediate member 11, engage holes 20 and 21 extending through members 10 and 12 to insure the correct alignment of the molding de ressions of. the members 10, 11 and 12. e holes 16, 17, 20 and 21 are countersunk as shown so be more readily removed therefrom an to provide s ace to receive the overflow of the materia incular cavities 25 and 26 formed by coo erating grooves in the members 10, 11 an 12 are provided which may not be required in the completed article. Slots'28 are provided, into which a tool may be inserted to assist in separating the members upon the completion of a molding operation..-

The mold as illustrated is particularly adapted for forming a plurality of sheets 29 and 30 of fibrous material, preferably of linen, and which preferably may be impregto receive surplus material 27 nated with a phenolic varnish which is dried and thus .partially cured or condensed, into an integral sheet 24. Such a sheet may serve as a diaphragm for translating electrical impulses into sound closed and claimed in the patent issued to F. S, Kochendorfer, No. 1,559,260, October 27, 1925. It is, however, to be understood that the scope of the invention is not in any. manner limited to the manufacture of such an article.

' In the molding operation the members 10, '11 and 12 are disassembled and the member 11 is placed in a horizontal position suitablysupported upon a table. Two of the centrally perforated disks 29 are then assembled between two of the small disks 30, also centrally perforated, upon, the pin 15 and against the upper surfacegof the member 11. Member 12 may then be laced against the upper surface of the mem er 11, the projecting ends of pins 15, and 18 engaging -the holes 17 and 21 respectively. The associated members 11 and 12 are then turned to place the exposed surface of member 11 uppermost. Another setof disks 29 and 30 is assembled upon the upwardly projecting point of pin 15, and the mem er 10 is placed upon t e member 11, the pins 15' and 18 engaging holes 16 and 20 respectivel It is to be noted that the depressions in the member 11 are identical and that therefore members 10 and 12 ma be indiscriminately associated with eit er surface of member '11.

The filled mold may then be placed, in

I compan with .a lurality of other similar ofa molds, tween p atens which may exert a pressure of 1000 pounds per square inch upon the disks and heat themtoa temperatnre'of approximatel 3%? F. for approximately 6 minutes. he platens are then separated, the molds are removed therefrom and placed between coolin platens for aproxlmatel 2 minutes. The mold memers may t en be .se arated by the insertion pointed tool in the slots 28 andthe molded articles 24 removed therefrom. The ragged edge 2 consisting of the surplus resin whichcoll cted in the cavit 25 in the moldin process are removed y cutting I along t e dotted line 31, leaving the completed article. of the correct' size. The molds, including the holes 17 and the cavities 25, are then cleaned if necessary and the -operati n repeated. a It will be noted that the pressures, tem: peratures and length of moldi'n and cooling periods are those usually ollowed in asheet of synthetic resinous mate-, rial into a hardinfusible and insoluble produet g I The condensation product does not adhere to the copper plating of the mold, and due waves when" mounted in a structure such as that disto the polished surface'of" the molding depression, a smooth glossy surface is produced upon the molded article. Also due to the use of steel as a reinforcing material forthe copper plating, the molding surface is not subject to distortion or defacement during'the molding and handling operations.

"What is claimed is: y

1. In an apparatusfor, forming material into an article,.a central disk, a plurality of pins tapered at either end mounted in the tion for shaping the material, said member formed of metal having a relatively high elastic limit, and a thin copper face integrally united with the member for contacting with the material to be formed. 1

3. In an apparatus for forming material into an article, a member for shaping the material, said member made of metal having a relatively high elastic limit, and copper platedupon the member to form a face rfOl contacting with the material to be formed-- 4. In an apparatus for forming material into an article, a hardened steel member for shaping the material, and athin coating of r copper plated thereon to form a face for contacting with the material to be formed.

'5. In an apparatus for forming synthetic resinous-material into an article, a hardened steel memberfor shaping the material, and copperplated on the member to form a face for contacting "with the synthetic resinous, material. 6. In an apparatus for forming material into an article, a plurality of members having co-operating depressions for forming the material, said members; made of metal having a relatively high elastic limit, and a .thin copper covering for said members conforming with the depressions thereof and integrally united'with the members.

7. In an apparatus for'forming material into an article, a plurality of members hav-- ing co-o rating depressions for forming the materia said members formed of metal having a relatively high elasticlimit, and cop per plated on said members to form a face for contacting .with' the material to be formed. V

8; In an apparatus for forming synthetic resinous material into an article, a plurality of hardened steel members having co-operating de ressions for forming the material,.

and a 't n coating ofcopper plated on said members to form a face for contacting with r the synthetic resinous material.

9. A mold for simultaneously forming a i plurality of articles,

comprising three members, said members having co-o ating depressions for forming material mto articles when placed adjacent to each other, and means carried by the intermediate member of the adjacently placed members and engaging the other members for positioning the members. v v

10. A mold for forming an article, comprising top, bottom and intermediate mold members, said members having co-operating depressions for forming material into articles, and means carried by the intermediate member and engaging the other members for positioning the members.

11. A mold for forming a plurality of articles, comprising top and bottom members having depressions therein, an intermediate member having a plurality of depressions pressions for co-operating with the depressions in the to and bottom members .to simultaneously orm a plurality of articles, and means carried by the intermediate member for positioning the members.

12. A mold for simultaneously forming a plurality of articles, comprising three members, said members having co-operating defor forming material into articles when placed adjacent to each other, and a pin mounted in the center of the intermediate member and carried thereby and projecting from opposite sides of said intermediate member to engage the other members for positioning the members.

In witness whereof, I hereunto subscribe my name this 30th day of August A. 1).,

. HENRY L. WARD. 

